Temporary Insurance If You Are A Temporary Resident In The United States, How Can You Receive Health Services Or Insurance?

If you are a temporary resident in the United States, How can you receive health services or insurance? - temporary insurance

I know someone who is from Haiti to the United States after the earthquake and is sick. Is there a program or how health services for free health insurance or temporary, can benefit to cover their costs? Is there a sickness that comes with temporary residence visa?